I've done a few of them. I did get a receipt, but paid cash. The total came up less than stated in the description for the coney crate. My MasterCard receipt showed the coney crate. It was approved.
Do not read so much, look about you and think of what you see there.
Richard Feynman-- letter to Ashok Arora, 4 January 1967, published in Perfectly Reasonable Deviations from the Beaten Track (2005) p. 230